# Detect schema drift in an Apify dataset

**Use case:** 

Monitor scheduled scraper dataset output for schema, record-count, missing-rate, and field-type drift without storing raw row values.

## Input

```json
{
  "items": [
    {
      "url": "https://example.com/products/a",
      "title": "Sample product A",
      "price": 19.99,
      "availability": "in_stock"
    },
    {
      "url": "https://example.com/products/b",
      "title": "Sample product B",
      "price": 29.99,
      "availability": "out_of_stock"
    }
  ],
  "baselineKey": "sample-product-catalog",
  "sampleLimit": 2,
  "countDropRatio": 0.25,
  "missingRateDelta": 0.2,
  "typeShiftDelta": 0.5,
  "stateStoreName": "dataset-drift-monitor-sample"
}
```

## Output

```json
{
  "product": {
    "label": "Product",
    "format": "string"
  },
  "checkId": {
    "label": "Check id",
    "format": "string"
  },
  "severity": {
    "label": "Severity",
    "format": "string"
  },
  "summary": {
    "label": "Summary",
    "format": "string"
  },
  "subjectId": {
    "label": "Subject id",
    "format": "string"
  },
  "generatedAt": {
    "label": "Generated at",
    "format": "string"
  }
}
```

## About this Actor

This example demonstrates how to use [Dataset Drift Monitor](https://apify.com/checksmithcats/dataset-drift-monitor.md) with a specific input configuration. Visit the [Actor detail page](https://apify.com/checksmithcats/dataset-drift-monitor.md) to learn more, explore other use cases, and run it yourself.


## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
This Task's input is already configured above — use it as-is rather than inventing a new one.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For full API examples (JavaScript, Python, CLI, MCP, OpenAPI), see this Task's Actor page: https://apify.com/checksmithcats/dataset-drift-monitor.md

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).